Machine for grinding glass.



PATBNTBD AUG. 25, 1903. G. L. GOEHRING & W. TROGHE.

MACHINE FOR GRINDING GLASS. APPLICATION FILED mm 2, 1903.

N0 MODEL. 3 SHBETS-SHBET 1.

Qvibwaocn X a No. 737,334. PATENTED AUG. 25, 1903. c. L. 3031131113 3; W. TROGHE.

MACHINE FOR GRINDING GLASS.

APPLICATION FILED JUNE 2, 1903.

Is I H TI l 1 W 3 T I IE] HF\Q I) I I Z hwm-urozs @Xihmnco I 6m Z"! I Mm-WM No. 737,394. PATENTED AUG. 25, 1903.

0. L. GOEHRING & w. TROGHE. MACHINE FOR GRINDING GLASS.

APPLICATION FILED JUNE g, 1903'. N0 MODEL. 3 SHEE TSSHBET 3.

}DU- El E] El III B U CI U q 4 MM fiQAj'jZf i R M M 6 at tomcqi UNITED STATES Patented August 25, 1903.

PATENT OFFICE.

CHARLES L. GOEI-IRING AND WILLIAM TROOHE, OF AKRON, OHIO; SAID TROGHE ASSIGNOR TO SAID GOEHRING.

MACHINE FOR GRINDING GLASS.

SPECIFICATION forming part of Letters Patent No. 737,394, dated August 25, 1903.

Application filed June 2, 1903- Serial No. 159,773. (No model.)

To all whom it may concern:

Be it known that we, CHARLES L. Gonna- ING and WILLIAM TROCHE, of Akron, in the county of Summit, State of Ohio, have invented certain new and useful Improvements in Machinery for Grinding Glass; and we do herebydeclare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the letters of reference marked thereon.

This invention relates to improvements in machinery or apparatus for grinding glass, such improvements being more especially though not exclusively applicable to that class of glass grinding machinery designed for forming bevels on glass plates, the object of the invention being to provide a more simple and convenient mechanism for positioning the glass plates with their face-surfaces in parallelism with the grinding-surface of the grinder at the grinding-point.

I The invention consists,primarily,in a grinding apparatus embodying a bed against which the glass plate is clamped by a suitable clamping mechanism, which latter is located on the same side of the plane of the glass with the grinder itself, but is maintained with its positioningsurface in parallelism to said grinder and is capable of a movement toward and from the bed to properly clamp and hold the glass.

The invention further consists in certain novel details of construction and combinations and arrangements of parts, all as will be now described, and pointed out particularly in the appended claims.

Referring to the accompanying drawings,

Figure 1 is a side elevation of so much of the glass-grinding machine as is necessary to illustrate the present improvements thereon. Fig. 2 is a front elevation with parts in section and broken away to more clearly illustrate the construction. Fig. 3 is a top plan view, the grinder being omitted from the last two figures.

Like letters of reference in the several figures indicate the same parts.

The letter A. indicates a grinder of cylindrical form adapted to be mounted and driven in any usual or preferred manner, while B indicates the upper portion of a table or frame adapted to carry bearings B, in which a pivoted table 0 is journaled,preferably,ata point near its edge in proximity to the grinder. The table 0 constitutes the secondary glasssupport and is journaled in the bearings B in order that the angle of the glass plate in a plane transversely of the axis of the grinder may be varied in accordance with the desired depth and width of the bevel to be formed, the angular adjustment of said table C being effected by a screw D, located beneath its forward edge and preferably having a handwheel D, by which it may be rotated, and a rounded upper end d, seating in a socket in the table, as illustrated in Fig. 2. The axis on which the table 0 swings in its pivotal movement is maintained in parallelism with the axis of the grinder; but it will be understood that the grinder and table have a traverse with respect to each other, as is now well understood in this art, to effect the grinding operation, for which purpose either the grinder may be moved bodily transversely of its axis in the plane of the surface to be ground, as by the pitman T, engaging its bearings R, traveling on the ways S, or the frame or table B,wit-h the parts carried thereby, may be similarly moved, both of which movements have heretofore been used, and it is not thought necessary to illustrate the mechanism herein for accomplishing such movements, save as before indicated.

The arrows E E indicate the direction in which the movements take place.

Upon the table C is a vertically-extending frame, preferably formed by standards F, having parallel ways f thereon for the reception of vertically-movable bearing-blocks G, said blocks G being movable on the ways and maintained in the same relative positions with respect to the axis formed by the bearings B by means of vertical adj usting-screws l-I, journaled in the standards or otherwise suitably supported and having bevel-gears I at their upper ends connected by a cross-shaft K and bevel-gears 70, whereby upon the rotation of said cross-shaft K, as by hand-wheel K or other suitable means, the bearing-blocks G will be raised or lowered, as is desired.

In the bearing-blocks G there is journaled a clamp M, the axis of said clamp formed by the bearings being maintained parallel with the axis of the table 0 and with the axis of the grinder, said clamp, however, being capable of a pivotal movement in a plane transversely of said axis to accommodate itself to the surface of the glass in that plane, and the bottom face of said clamp is made true and adapted to receive or bear against the face side of the glass when said glass is clamped beneath the clamp, as will be now explained.

On the table or support 0 is a primary glass support or table N, mounted on a central axis to tilt in a plane longitudinally of the axis of the, grinder, the pivot or bearing for the support or table N being preferably formed by a centrallyarranged semicylindrical rib N, Fig. 2, on the table N and seating in a similarly-formed groove or socket in the table or support 0. Movement of the table or support N longitudinally of the bearing N is prevented by stops 0 at front and rear of the table C Thus the said support N will adjust itself to any variation in the thickness of the glass, while the upper or face surface of the glass will be held by the under face of the clamp M in perfect parallelism with the surface of the grinder at the grinding-point. As an illustration should the glass be half an inch thick at one side and one-fourth of an inch thick at the opposite side it is obvious that the bevel should be uniform with respect to the face side of the glass, and When such a glass is clamped in the present apparatus the face side willbe held parallel with the surface of the grinder at the grindingpoint, while the rear side or back of the glass will cause the table or support N to occupy an inclined position with respect to the axis of the grinder; but at the same time said glass will be supported throughout-its length or width and clamped firmly in position dur-' ing the grinding operation. The clamping is effected by moving the bearing G downwardly, and the table or supportN automatically adjusts itself with the rear face of the glass, after which the glass and grinder are caused to traverse with respect to each other in the plane of the surface to be ground and transversely of the axis of the grinder.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-- 1. In a glass-grinding machine, the combinationwith a cylindrical grinder and a table adapted to traverse with respect to each other during the grinding operation, of a clamp mounted on said table to move in right lines toward and from the same with means for moving said clamp and a glass-support mounted on the table beneath said clamp on assess a central axis to tilt in a plane longitudinally of the axis of the grinder whereby said support may adjust'itself to inequalities in the thickness of the glass operated upon; substantially as described.

2. In a glass-grinding machine, the combi nation with a cylindrical grinder and a table adapted to traverse with respect to each other during the grinding operation and located on opposite sides of the plane of the glass, of a clamp movable toward and from the table with its clamping-face parallel with the axis of the grinder, means for moving said clamp and a self-adjusting glass-support mounted on the table and against which the glass is clamped for presentation to the grinder; substantially as described.

3. In a grinding-machine for glass the combination with a cylindrical grinder, a table mounted on an axis parallel with the axis of the grinder, said table and grinder being adapted to traverse with respect to each other during the grinding operation, of a clamp pivotally mounted on the table on an axis parallelwith the axis of the grinder and adapted to move toward and from the table, means for moving said clamp and a self-adjusting glass-support carried by the table and against which the glass is clamped for presentation to the grinder; substantially as described.

4., In a glass-grinding machine the combination with a cylindrical grinder, a table located on the opposite side of the plane of the glass from said grinder on an axis parallel with the axis ofthe grinder and means for adjusting the inclination of said table, of a vertically-extending frame on said table having ways thereon, a clamp mounted on'said ways to move toward and from the table with its clamping-face parallel with the axis of the grinder, means for moving said clamp toward and from the table and a glass support mounted on the table on a central axis to tilt in a plane longitudinally of the grinder; substantially as described.

5. In a glass-grinding machine the combination with a cylindrical grinder and a table mounted on opposite sides of the plane of the glass and adapted to traverse with respect to each other during the grinding operation, of a vertical frame mounted on said table and having ways thereon, bearing-blocks mounted on said ways and movable toward and from the table with means for moving said blocks, a clamp journaled in said blocks on an axis parallel with the axis of the grinder and a glass-support pivotally mounted on the table on a central axis to tilt in a plane longitudinal of the axis of the clamp and grinder; substantially as described.

6. In a glass-grinding machine the combination with the cylindrical grinder and table located on opposite sides of the plane of the glass, said table being pivoted at its edge in proximity to the grinder on an axis parallel with the axis of the grinder with means for holding the table in the desired angular position, of a vertically-extending frame on said table, a clamp mounted on an axis parallel with the axes of the grinder and table and movable in right lines toward and from the table with means for moving the said clamp and glass-support pivotally mounted on the table on a central axis to tilt in a plane l0ngitudinally of the axis of the clamp; substan- 1o tially as described.

CHARLES L. GOEHRING. WILLIAM TROCHE. Witnesses:

GRACE M. ZAHNISER, F. J. STEINERT. 

